Suppose the average mass of raindrops is `3.0xx10^(-5)kg` and their average terminal velocity `9ms^(-1)`. Calculate the energy transferred by rain to each square metre of the surface at the place which receives 100 cm of rain in a year.

Explanation

Here, average mass of rain drops
`=3.0xx10^(-5)kg`
`upsilon=9ms^(-1), A=1sq. Metre.`
`h=100cm=1m.`
`:.` Volume of water due to rain, `V=Axxh=1xx1=1m^(3)`
As density of water ,`rho=10^(3)kg//m^(3)`
`:.` mass of water due to rain `M=V_(rho)=1xx10^(3)kg`
Energy transferred `=KE=(1)/(2)Mupsilon^(2)=(1)/(2)xx10^(3)(9)^(2)=4.05xx10^(4)J`